Contact-mounting means



Fgb. 25, 1930. DAY 1,748,912

' commcrr MOUNTING mums Original Filed April 9. 1920 structed PatentedFeb. 2,5, v1930 UNITED STATES SALISBURY M. DAY, OF ROGHESTER, NEW YORK,ASSIGNOR TO GENERAL RAILWAY SIGNAL COMPANY, 01E ROCHESTER, NEW YoRK ACORPORATION OF NEW YORK CONTACT-MOUNTING MEANS This invention relatesto'contacts for use in relays of various types and has more particularreference to means for mounting a contact on a carrying arm.

The present application is a division of applicants co-pendingapplication Ser. No. 372,585 filed April 9, 1920, for Improvement inrelays.

Among the objects of this invention are to provlde economical, secure,and simple means for connectlng a contact to a carrying arm andat thesame timeto provide a good electrical conducting connection between thecontact and the arm.

Further objects, purposes and characteristic 7 features of the inventionwill appear as the description progresses, reference being had to theaccompanying drawing, showing solely by way of example, one form whichthe invention may assume, and wherein Fig. 1 is a sectional detailedview, ofa part ofthe device.

Fig. 2 is a side elevation of a device conin accordance with the presentinvention.

Referring to the drawings, a support bracket 60, carried by the usualtop plate of a relay, carries a screw.62 held in its lower end by meansof a nut 63, which screw has a disc-like contact 64 mounted on its headand formed of .a non-corrosive, highly conductive metal, such as coinsilver or the lilze.

A contact finger 34, connected to a carrler bar, or electro-magnetarmature in. any usual manner, has riveted thereto a spring arm 51,

to the end of which is fastened a contact block 67 A reduced extendedportion of the finger 34is bent downwardly to-bear against the springarm 51 andprevent its flexing in one direction.

The contact button 67 is preferably formed of carbon of a hardcrystalline structure, and is impregnated with a small percentage'ofcopper to increase its conductivlty. Care is taken to not add too greata percentage of copper in order that all possibilit of fusing of thecontacts and resulting'stic ing of the same, be avoided. The button 67has beveled edges and fits into a sheet metal on 68 having its edgesspun over around the utton to firmly hold arms 69 are stamped out ofthebottomof the cup and are passed through spaced slots 51 mthe springarm 51 and are then bent toward 9, 1920, Serial No. 372,585. Dividedand. this application filed. Se tember 7 22, 1926. Serial No. 137,138. Is.

it within thecup. Two spaced v With the construction described above a 7ready and secure means is furnished for connecting the button 67 toitscarrying arm 51, and a good electrical connection is formed betweenthe button and its carrying arm.

The above specific description of the present invention is given solelyby way, of illus tration and is not intended in any manner whatsoever inalimiting sense, Obviously this invention can assume many differentforms and is susceptible of various modifications, and all'such formsand modifications are contemplated as being included by this inventionas come within the scope of the appended claims. 7

Having described one form of my invention, I now claim 1. A carboncontact for relays comprising a spring having spaced slots therein, acarbon button with a beveled edge, and a cup receiving said button andhaving its edge spun over the edge of the button, said cup having prongsstamped out of its bottom which extend through said slots and are bentback to hold the cup in place.

2. In a relay contact, a carrier arm, spaced slots in the carrier arm, acup, arms stamped out of the bottom of the cup, passed through saidslots, and bent towards each other against the rear side of the carrierarm, and a contact button fixed in the cup.

3. In a relay contact, a carrier arm, spaced slots in the carrier arm, acup, arms stamped out of the bottom of the cup, passed through saidslots, and bent towards each other against the rear side of the carrierarm, and a contact button fixed in the cup, and solder connecting theends of the arms to each other and to the rear side of the carrier arm.

4.. In a relay Contact, a carrier arm, spaced slots in the arm, a cup, acontact having a beveled edge and rigidly and non-removably held in thecup by spinning the edge of the cup over said edge, narrow integral armsstamped out of the cup whereby to leave a large portion of the cup baseto support the base of the contact passing through the slots in thecarrier arm and bent over to hold the cup tightly to the arm, and soldercon-. necting the ends: of the. arms to each other and to the rear ofthe carrier arm, whereby to form a permanent and low resistanceelectrical connection between the carrier arm and said contact. e V

5. In a relay, a contact button, a cup nonremovably carrying the button,an arm, slots and cooperating integral lugs carried by the cup and armfor fastening the cup to the arm, and non-removable connecting meansbetween said cup and arm.

In testimony whereof I aflix my signature.

SALISBURY DAY.

